Hydraulic engine.



No. 653,46l, Patented luly IU, |900.

HYDRAULIC ENGINE.

(Application filed July 10, 1899,)

(No Model.)

LORENZO D. B. SHAW, OF NEW YORK, N. Y.

HYDRAULIC/ENGIN.

SPECIFICATION forming part of Letters Patent ITO. 653,461, dated July' 10, 19O.

Application filed .Tuly 10,1899. Serial No. 723,298. (No model.)

To all whom. t ntay concern.:

Be it known that I, LORENZO D. B. SHAW, a citizen of the United States, and a resident of New York, (Coney Island,) inthe county of Kings and State of New York, have invented certain new and useful Improvements in I-Iydraulic Engines, of' which the following is a specification.

The object of my invention is to produce an engine in which water is the motive power.

The invention consists of two cylinders communicating with each other by a chamber or passage at each end, each cylinder containing a sliding cylinder of smaller diameter and about the same length, which are free to slide in suitable guides and act as valves for regulating the induction and eduction of the [luid to act upon pistons contained and working in said sliding cylinders, both pistons traveling in the same direction, they being connected to a cross-head that by a pitman is connected to a crank on the driving-shaft,which also carries eccentrics that operate the inner cylinders or valves.

Referring to the accompanying drawings, Figure l represents an end elevation of an engine embodying myinvention. Fig. 2 is a side elevation of same. Fig. 3 is alongitudinal vertical section through the cylinders. Fig. 4t is a side View of one of the sliding cylinders or valves. and elevation of one of the valve seats and guides.

A represents a base-piece upon which are mounted two cylinders B B', the upper ends of which are closed by a cap or cover C. The cylinders are each provided with a pipe D D' for the induction and eduction of the iiuid. The base A and cap O are each provided with a passage a c, so as to form a communication between the cylinders at each end, and the cap Gis also provided with suitable stuffingboxes e CZ for the piston-rods and valve-stems. The inner faces of the base-piece and cap are recessed down opposite the end of each cylinder to receive the valve-seats F 'F. The bases of these valve-seats are slightly larger than the internal diameter of the cylinders B B', so that they are held in position by the base-piece A and cap C. The valve-seats are provided with prongs or projections ff, that act as guides for the sliding cylinders or Fig. 5 shows, respectively, a plan valves G G', which are free to work up and down and are operated by valve-stems H and connected by rods h lt to cranks or eccentrics .I on a crank-shaft I, the crank I' of which is, by a pitman l2, connected to a cross-'head 13, to which the piston-rods K are connected. I

In each of the sliding cylinders G is fitted a piston K2, secured to the end of the rod K, the upper end of which is secured to the crosshead I3, operated by the crank I through pitman I2.

' As the sliding cylinders G G operate to admit or cut off the supply of fluid the space be` tween the prongs ffon the valve-seat F form ports for the iiuid to pass through when the ends of the cylinders are within the inner faces of the valve-seats F.

The operation is as follows: The engine being in the position shown in the drawingsthat is, with the pistons at half-stroke and the cylinder or valve G down, so as to admit the fluid on the upper side of the pistons K2, and the other cylinder or valve G raised, so that fluid can pass outat its lower end-now supposing the iiuid to be entering by the pipe D it takes an upward course in the direction of the arrows l and passes through the valveseat into the passage c and exerts an equal pressure upon the upper end of both the pistons K2, which are thus caused to descend, and through the cross-head I3,connectingrod, and crank l transmits a rotary motion to the shaft I, which by means of the eccentrics J causes the positions in the cylinders G G to be reversed, so that the fluid will pass down to the under side of the pistons K2 and cause them to .be raised. The fluid that was in the chamber ct will in the meantime have passed in the direction of the arrows 2 and be eX- hausted out of the pipe D; but a certain proportion of' the fluid will always be left in the chambers a and c, so that as soon as the sliding cylinder or valve G is moved to admit the fluid at either end there will not be any lost motion, as the incoming fluid will at once act upon the fluid that is retained in the chambers, and thus at once exert pressure upon both pistons simultaneously.

It will be found that with an engine constructed as described great power and speed are obtained. The inner cylinder or valve bea ing contained in the pressure, it is perfectly balanced, the friction is reduced to a minimum, and there is nothing that can get out of order. Thus the engine will last a longtime with Very little care.

What I claim is- In an engine the combination of two pistons moving in the same direction, sliding cylinders or valves reciprocating in opposite directions and in which said pistons Work, one of said cylinders or Valves acting as a supply x and the other as an exhaust substantially as set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

LORENZO D. B. SHAW. XVitnesses:

CALEB H. SWAN, EDWIN PLANTA. 

